CN110746871A - Polyurethane coating and preparation method thereof - Google Patents

Polyurethane coating and preparation method thereof Download PDF

Info

Publication number
CN110746871A
CN110746871A CN201911043278.6A CN201911043278A CN110746871A CN 110746871 A CN110746871 A CN 110746871A CN 201911043278 A CN201911043278 A CN 201911043278A CN 110746871 A CN110746871 A CN 110746871A
Authority
CN
China
Prior art keywords
component
parts
polyurethane coating
coating
dipropylene glycol
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911043278.6A
Other languages
Chinese (zh)
Inventor
方博
赵蓉
李国军
张玉国
王从国
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou Kinte Industrial Co Ltd
Original Assignee
Guangzhou Kinte Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangzhou Kinte Industrial Co Ltd filed Critical Guangzhou Kinte Industrial Co Ltd
Priority to CN201911043278.6A priority Critical patent/CN110746871A/en
Publication of CN110746871A publication Critical patent/CN110746871A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/62—Polymers of compounds having carbon-to-carbon double bonds
    • C08G18/6216—Polymers of alpha-beta ethylenically unsaturated carboxylic acids or of derivatives thereof
    • C08G18/622—Polymers of esters of alpha-beta ethylenically unsaturated carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Paints Or Removers (AREA)

Abstract

The invention belongs to the field of materials, and particularly discloses a polyurethane coating which comprises a component A and a component B, wherein the component A comprises the following components in parts by weight: 40-65 parts of water-based acrylic resin, 10-30 parts of solvent, 3-25 parts of pigment, 5-20 parts of film-forming additive, 1-5 parts of dispersant, 0.1-0.5 part of wetting agent, 0.1-0.3 part of defoamer and 0.1-0.5 part of alcohol amine compound; the component B is a curing agent containing isocyanate and/or isocyanate derivative. The polyurethane coating can adjust the surface drying time of the coating, has high reaction speed at 40-70 ℃, is uniform in film forming, cannot be immediately aggregated and unevenly dispersed on the surface of an object at the temperature of 40-70 ℃ to form particles, cannot be completely dried at the temperature of 40-70 ℃, has high surface viscosity, and is easy to stick to a package.

Description

Polyurethane coating and preparation method thereof
Technical Field
The invention belongs to the field of materials, and particularly relates to a polyurethane coating and a preparation method thereof.
Background
The jack is a hoisting device which takes a rigid jacking piece as a working device and jacks a heavy object through a top bracket or a bottom supporting claw within a small stroke. The jack is mainly used for the departments of factories, mines, transportation and the like as vehicle repair, other lifting, supporting and the like.
Omega spiral disc type electrostatic coating is widely applied to coating of jacks due to high efficiency and convenient use. Because the jack workpiece is thick and heavy, the heat dissipation is slow, the temperature of the jack body after pretreatment is not reduced to the normal temperature during the coating production of the jack, and is difficult to be reduced to the normal temperature, 40 ℃ is low, and 60 ℃ is high. Therefore, in the actual process, the coating is sprayed on and is easily dried immediately to form particles; after baking, the jack body can also have higher temperature when the jack is inserted into the production line for packaging, and the paint film is not completely cured at the moment, so that the phenomenon of adhering packages is easy to occur. However, jack has quite high requirements on appearance and performance of surface coatings, and most of jacks need high gloss and high fullness, so most of jack coating manufacturers still use the traditional solvent-based two-component polyurethane coating for coating at present, and VOC (volatile organic compound) emission is high.
Therefore, aiming at the coating production of the jack, the polyurethane coating is provided, and the conditions that the polyurethane coating is not dried immediately to form particles and the sticky package occurs under the conditions of not changing the process and ensuring the appearance and the performance of the polyurethane coating are very necessary.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, the present invention proposes a polyurethane coating having low VOC (volatile organic compound), high gloss, which does not immediately dry to form particles when applied to the surface of a jack body during coating, and does not easily stick to a package when packaged at the lower line thereof.
The polyurethane coating comprises a component A and a component B, wherein the component A comprises the following components in parts by weight:
Figure BDA0002253437150000011
Figure BDA0002253437150000021
preferably, the component A consists of the following components in parts by weight:
Figure BDA0002253437150000022
the component B is a curing agent containing isocyanate and/or isocyanate derivatives, and preferably the component B is Kostex XP 2655.
The mass part of the component B is 5-25% of that of the component A; preferably, the mass part of the component B is 10-20% of the mass part of the component A.
The alkanolamine compound comprises diethanolamine.
The film forming agent consists of dipropylene glycol methyl ether, dibasic ester and alcohol ester twelve, and preferably, the mass ratio of the dipropylene glycol methyl ether to the dibasic ester to the alcohol ester twelve is 1:1 (0.5-1.5); further preferably, the mass ratio of the dipropylene glycol methyl ether to the dibasic ester to the alcohol ester dodeca is 1:1: 1.
The solvent is water.
The water-based acrylic resin is Tesmann XK-540 and/or Diegon WD-551.
The pigment is selected from organic red, titanium dioxide or carbon black.
The dispersant is one or two of Bick BYK2012 and winning DEGO 755.
The wetting agent is one or two of ByK3440 and DEGO 4100.
The defoaming agent is one or two of ByK024 and DEGO 810.
A preparation method of a polyurethane coating comprises the following steps:
(1) weighing the water-based acrylic resin, the solvent, the dispersant, the defoamer and the pigment according to the formula ratio, stirring and grinding until the particle size is less than 15um, sequentially adding the wetting agent, the film-forming assistant and the diethanolamine, and mixing to obtain the component A;
(2) and mixing the component A and the component B, uniformly stirring, and adjusting the pH value to be 7.5-9.5 to obtain the polyurethane coating.
The polyurethane coating is applied to a coating process of a jack.
The polyurethane coating is prepared by the cross-linking reaction of a high-hydroxyl-content water-based acrylic resin and a curing agent containing isocyanate and/or derivatives thereof, and simultaneously, by adding a proper film-forming assistant, the polyurethane coating shows excellent effects when the mass ratio of dipropylene glycol methyl ether, dibasic ester and alcohol ester dodeca is 1:1 (0.5-1.5), particularly 1:1: 1. The film forming assistant in the proportion is reasonably composed with other components, so that the polyurethane coating can quickly react to form a film under the condition of low VOC, the film forming speed is high, the surface is uniform, and the polyurethane coating cannot be immediately aggregated on the surface of an object to form particles at the temperature of 40-70 ℃.
Compared with the prior art, the invention has the following beneficial effects:
the polyurethane coating can adjust the surface drying time of the coating, has high reaction speed at 40-70 ℃, is uniform in film forming, cannot be immediately aggregated and unevenly dispersed on the surface of an object at the temperature of 40-70 ℃ to form particles, cannot be completely dried at the temperature of 40-70 ℃, has high surface viscosity, and is easy to stick to a package.
Detailed Description
In order to make the technical solutions of the present invention more apparent to those skilled in the art, the following examples are given for illustration. It should be noted that the following examples are not intended to limit the scope of the claimed invention.
Examples 1-5, dieda WD-551 used in comparative examples 1-9 was purchased from dieda group, diseman XK-540 was purchased from diseman group, bike BYK2012 was purchased from bike chemical company, winning digo 755 was purchased from winning industrial group, bike BYK3440 was purchased from bike chemical company, winning digo 4100 was purchased from winning industrial group, bike BYK024 was purchased from bike chemical company, winning digo 810 was purchased from winning industrial group, kesi XP2655 was purchased from kesi polymer limited, and F5RK red pigment was purchased from kedi new materials limited.
Example 1
Weighing 30 parts of Di-Aisheng WD-551, 25 parts of Tesmann XK-540, 30 parts of deionized water, 3 parts of Bik BYK2012, 0.2 part of YingChuang DEGO810 and 5 parts of F5RK red pigment, stirring and grinding until the particle size is 10 mu m, sequentially adding 0.3 part of YingChuang DEGO4100, 4 parts of dipropylene glycol methyl ether, 4 parts of alcohol ester dodeca, 4 parts of dibasic acid ester and 0.3 part of diethanolamine, stirring uniformly, adjusting the pH value to be 8.0-9.0, and sieving by a 300-mesh filter screen to obtain a component A; and mixing the component A with 20 parts of CorsiChuan XP2655 to obtain the polyurethane coating.
Example 2
Weighing 55 parts of Di-Aisheng WD-551, 20 parts of deionized water, 5 parts of Yingchuang DEGO755, 0.2 parts of ByK024 and 10 parts of titanium dioxide, stirring and grinding until the particle size is 10 mu m, sequentially adding 0.3 parts of ByK3440, 4 parts of dipropylene glycol methyl ether, 6 parts of alcohol ester dodeca, 4 parts of dibasic ester and 0.2 part of diethanolamine, stirring uniformly, adjusting the pH value to be 7.5-8.5, and filtering with a 300-mesh filter screen to obtain a component A; and mixing the component A with 20 parts of CorsiChuan XP2655 to obtain the polyurethane coating.
Example 3
Weighing 30 parts of Di-Aisheng WD-551, 30 parts of Tesmann XK-540, 30 parts of deionized water, 3 parts of Bik BYK2012, 0.2 part of YingChuang DEGO810 and 15 parts of F5RK red pigment, stirring and grinding until the particle size is 10 mu m, sequentially adding 0.3 part of YiChuang DEGO4100, 4 parts of dipropylene glycol methyl ether, 5 parts of alcohol ester dodeca, 4 parts of dibasic ester and 0.5 part of diethanolamine, stirring uniformly, adjusting the pH value to be 8.0-9.5, and sieving with a 300-mesh filter screen to obtain a component A; and mixing the component A with 20 parts of CorsiChuan XP2655 to obtain the polyurethane coating.
Example 4
Weighing 40 parts of Disemann XK-540, 10 parts of deionized water, 1 part of byK2012, 2 parts of won DEGO755, 0.1 part of won DEGO810, 0.1 part of byK024 and 3 parts of F5RK red pigment, stirring and grinding until the particle size is 10um, sequentially adding 0.1 part of won DEGO4100, 2 parts of dipropylene glycol methyl ether, 1 part of alcohol ester twelve, 2 parts of dibasic ester and 0.1 part of diethanolamine, stirring uniformly, adjusting the pH value to be in the range of 8.0-9.0, and sieving with a 300-mesh sieve to obtain a component A; and mixing the component A with 20 parts of CorsiChuan XP2655 to obtain the polyurethane coating.
Example 5
Weighing 50 parts of Tesmann XK-540, 25 parts of deionized water, 2 parts of BickBYK 2012, 2 parts of Yingchuang DEGO755, 0.2 parts of Yingchuang DEGO810 and 25 parts of carbon black, stirring and grinding the mixture until the particle size is 10 mu m, sequentially adding 0.5 part of Yingchuang DEGO4100, 5 parts of dipropylene glycol methyl ether, 7 parts of alcohol ester dodeca, 5 parts of dibasic ester and 0.2 part of diethanolamine, stirring the mixture uniformly, adjusting the pH value to be between 8.0 and 9.0, and filtering the mixture by a 300-mesh filter screen to obtain a component A; and mixing the component A with 20 parts of CorsiChuan XP2655 to obtain the polyurethane coating.
Comparative example 1
The film forming aids in example 1, namely dipropylene glycol methyl ether, alcohol ester dodeca and dibasic ester, are changed into 1 part of dipropylene glycol methyl ether, 1 part of alcohol ester dodeca and 1 part of dibasic ester, and the rest of raw materials and the preparation method are the same as those in example 1.
Comparative example 2
The film forming aids in example 1, namely dipropylene glycol methyl ether, twelve alcohol esters and dibasic acid esters, are changed into 7 parts of dipropylene glycol methyl ether, 7 parts of twelve alcohol esters and 7 parts of dibasic acid esters, and the rest of raw materials and the preparation method are the same as those in example 1.
Comparative example 3
The dibasic ester in the film forming aid in example 1 was removed, and 6 parts of dipropylene glycol methyl ether and 6 parts of alcohol ester twelve were changed, and the remaining raw materials and the preparation method were the same as in example 1.
Comparative example 4
Twelve alcohol esters in the film forming auxiliary agent in the embodiment 1 are removed, 6 parts of dipropylene glycol methyl ether and 6 parts of dibasic ester are changed, and the rest raw materials and the preparation method are the same as the embodiment 1.
Comparative example 5
The dipropylene glycol methyl ether in the film forming aid in example 1 was removed, and changed to 6 parts of alcohol ester twelve and 6 parts of dibasic ester, and the remaining raw materials and the preparation method were the same as in example 1.
Comparative example 6
The film forming aids dipropylene glycol methyl ether, alcohol ester twelve and dibasic ester in example 1 were replaced with 12 parts dipropylene glycol butyl ether, and the remaining raw materials and preparation method were the same as in example 1.
Comparative example 7
The Diegon WD-551 in example 1 was removed, and the remaining raw materials and preparation method were the same as those in example 1.
Comparative example 8
The particle size of the ground particles in example 1 is 25um, and the rest of the raw materials and the preparation method are the same as those in example 1.
Comparative example 9
The preparation method is the same as that of example 1 except that 0.5 part of diethanolamine in example 1 is replaced by 1 part of diethanolamine.
The polyurethane coatings obtained in the above examples 1-5 and comparative examples 1-9 were coated on a jack production line for 25 seconds by adjusting the construction viscosity of a No. 2 cup, and the specific effects were measured and shown in Table 1.
Product effectiveness testing
TABLE 1 Effect of the product
Figure BDA0002253437150000051
As can be seen from Table 1, the VOC content of the polyurethane coatings obtained in examples 1-5 is 70-90g/L, which is significantly better than that of the polyurethane coatings obtained in comparative examples 1-9; meanwhile, when the polyurethane coatings obtained in examples 1-5 are applied to the coating process of the jack, the phenomenon of particles on the surface of the jack and the phenomenon of package adhesion are avoided, and when the polyurethane coatings obtained in comparative examples 1-9 are used for coating, the phenomenon of particles on the surface of the jack and the phenomenon of package adhesion are avoided.

Claims (10)

1. The polyurethane coating is characterized by comprising a component A and a component B, wherein the component A comprises the following components in parts by weight:
Figure FDA0002253437140000011
the component B is a curing agent containing isocyanate and/or isocyanate derivative.
2. The polyurethane coating of claim 1, wherein the a component consists of, in parts by weight:
Figure FDA0002253437140000012
3. the polyurethane coating as claimed in claim 1, wherein the mass fraction of the B component is 5-25% of the mass fraction of the A component.
4. The polyurethane coating of claim 1, wherein the alkanolamine compound comprises diethanolamine.
5. The polyurethane coating of claim 1, wherein the film former is comprised of dipropylene glycol methyl ether, dibasic ester and alcohol ester dodeca.
6. The polyurethane coating according to claim 5, wherein the mass ratio of the dipropylene glycol methyl ether to the dibasic ester to the alcohol ester twelve is 1:1 (0.5-1.5).
7. The method of producing the polyurethane paint according to any one of claims 1 to 6, characterized by comprising the steps of:
(1) weighing the water-based acrylic resin, the solvent, the dispersant, the defoamer and the pigment according to the formula ratio, stirring and grinding, sequentially adding the wetting agent, the film-forming assistant and the diethanol amine, and mixing to obtain the component A;
(2) and mixing the component A and the component B, and adjusting the pH value to obtain the polyurethane coating.
8. The method of claim 7, wherein the step (1) is carried out by grinding to a particle size of less than 15 um.
9. The method according to claim 7, wherein the pH in the step (2) is 7.5 to 9.5.
10. Use of the polyurethane coating according to any one of claims 1 to 6 in the painting process of jacks.
CN201911043278.6A 2019-10-30 2019-10-30 Polyurethane coating and preparation method thereof Pending CN110746871A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911043278.6A CN110746871A (en) 2019-10-30 2019-10-30 Polyurethane coating and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911043278.6A CN110746871A (en) 2019-10-30 2019-10-30 Polyurethane coating and preparation method thereof

Publications (1)

Publication Number Publication Date
CN110746871A true CN110746871A (en) 2020-02-04

Family

ID=69281112

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911043278.6A Pending CN110746871A (en) 2019-10-30 2019-10-30 Polyurethane coating and preparation method thereof

Country Status (1)

Country Link
CN (1) CN110746871A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7825210B2 (en) * 2001-10-25 2010-11-02 Construction Research & Technology Gmbh Aqueous, highly cross-linked two-component polyurethane coating system, method for the production and use thereof
CN102020917A (en) * 2010-11-18 2011-04-20 青岛德鑫汽车涂料有限公司 Water-based two-component acrylic acid polyurethane automobile paint and preparation method thereof
CN102618159A (en) * 2012-03-31 2012-08-01 广州集泰化工有限公司 Water-based polyurethane anticorrosive coating for containers and preparation method for coating
CN104098999A (en) * 2013-04-03 2014-10-15 湖北航天化学技术研究所 UV-heat dual-curing polyurethane coating, and preparation method and application thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7825210B2 (en) * 2001-10-25 2010-11-02 Construction Research & Technology Gmbh Aqueous, highly cross-linked two-component polyurethane coating system, method for the production and use thereof
CN102020917A (en) * 2010-11-18 2011-04-20 青岛德鑫汽车涂料有限公司 Water-based two-component acrylic acid polyurethane automobile paint and preparation method thereof
CN102618159A (en) * 2012-03-31 2012-08-01 广州集泰化工有限公司 Water-based polyurethane anticorrosive coating for containers and preparation method for coating
CN104098999A (en) * 2013-04-03 2014-10-15 湖北航天化学技术研究所 UV-heat dual-curing polyurethane coating, and preparation method and application thereof

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
孔志元: "水性聚氨酯树脂在工业涂料领域中的应用(续)", 《涂料技术与文摘》 *
张智: "《汽车美容与装饰》", 31 March 2004, 延边人民出版社 *
方博等: "汽车零配件用水性双组分聚氨酯涂料的", 《中国涂料》 *

Similar Documents

Publication Publication Date Title
CN101775245B (en) Multifunctional putty
CN103666229A (en) High solid coating for container and preparation method of high solid coating
CN102816487A (en) Silver priming paint of 1K silver powder containing automobile refinishing coating and preparation method thereof
CN107400454B (en) Salt-fog-resistant bi-component waterborne polyurethane varnish and preparation method thereof
CN109486318A (en) Solvent-free UV resin and its application
CN111320926A (en) Environment-friendly two-component water-based finishing varnish for automobile
CN115093756A (en) Quick-drying water-based acrylic acid marking paint for container and preparation method thereof
CN114231131A (en) Water-based brake disc coating and preparation method thereof
CN110819182A (en) High-environment-friendly alcohol-resistant wear-resistant water-based plastic paint and preparation method thereof
CN110746871A (en) Polyurethane coating and preparation method thereof
CN105820720A (en) UV curing coating for PVC material coating process and preparation method for UV curing material
CN109293852A (en) A kind of high glaze thermosetting aqueous epoxy modified acrylic resin and preparation method
CN110106032B (en) Automobile paint surface cleaning and repairing agent and preparation method thereof
CN114410162B (en) Water-based aluminum powder baking paint capable of being cured at low temperature and preparation method and application thereof
CN111117455A (en) High-solid-content high-weather-resistance varnish and preparation method thereof
CN110564271B (en) Solvent high-gloss base coat for skin
CN112795246A (en) Water-based fluorocarbon outdoor paint and preparation method thereof
CN109161316B (en) Coating with good surface adhesion and preparation method and application thereof
CN113717616A (en) Polishing-free UV (ultraviolet) adhesion primer for pasting melamine paper on medium density fiberboard and preparation method thereof
CN113372511A (en) Acrylic resin, water-based amino baking paint, and preparation method and application thereof
CN111040558A (en) High-performance water-based acrylic coating and preparation method thereof
CN112011242A (en) Water-based acrylic resin for coil coating and preparation method and application thereof
CN109627909B (en) Water-based epoxy zinc-rich primer and preparation method thereof
CN108822721A (en) A kind of vacuum coating UV coating and preparation method thereof
CN102634246A (en) Additive for improving appearance of paint and synthesis method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
CB02 Change of applicant information
CB02 Change of applicant information

Address after: No.5 Lisha East Road, Shatian Town, Dongguan City, Guangdong Province 523000

Applicant after: Qingtian Material Technology Co., Ltd

Address before: Shiling Town, Huadu District, Guangzhou City, Guangdong province 510860 Yufeng Road No. 16

Applicant before: GUANGZHOU KINTE INDUSTRIAL Co.,Ltd.

RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20200204